Vehicle brake



Dec. 6, 1927.

G. E. PARKER ET AL VEHICLE BRAKE Filed Feb.

293% Jim: GU01 Patented Dec. 6, 1927.

UNITED- STATES PATENT OFFICE.

GUY E. 2mm Ami ARTHUR H. sTAHLHUTn, or DETROIT, MICHIGAN! ASSIGNORS ToGENERAL noTons CORPORATION, OF nETaOIT, MICHIGAN, A CORPORATION or DELAWRE v VEHICLE BRAKE.

Application filed February 7; 1923. Serial No. 617,535.

This invention relates to vehicles, and is illustrated as embodied in anautomobile with a novel form of front wheel having a brake.

An Object of the invention is to arrange the wheel and brake to secure aminimum of interference between the braking and steering operations anda maximum Of ease of operation. To attain this object, the rock-shaftfor the brake cam is operated by a sleeve slidably arranged on a supportuniversally mounted directly On the springsupported chassis frame, theconnection between the Sleeve and rock-shaft being in the form of auniversal joint substantially in alinement with the steering axis of thewheel.

Having this same object in view, novel lubricating means is preferablyprovided for the brake cam and the operating connections. In one formthe cam and the ends of the band which engage it are inclosed in acasing which is arranged to be kept filled with lubricant.

' Other features of the invention relate to a novel arrangement forlubricating the parts which move in steering,-by the use of a hollowking pin, and to various other advantageouscombinations of parts anddesirable particular constructions which will be apparent from thefollowing description of the illustrative embodiments of our inventionshown in the accompanying drawings, in which steering wheel axle; I

Fig. 2 is a section on the line 22 of Fig. 1, showing parts of the brakein side elevation;

and its associated brake and Fig. 1 is a View, partly in.rear elevationand partly ll'l vertical section, of a front or In the form shown inFigs. 1-4, a front or steering wheel 10 is mounted on a. stub axlecarried by a knuckle 12 forked at 14,

The knuckle 12 and axle 18 are connected by a king pin 26, fastened toaxle 18 by a key 28, the bottom end of the king pin being journaled in abearing in fork 16 com prising a bushing 30 seated against a packing 32.A cap 34 is threaded On bushing 30 overthe end of the king pin toprotect it from dust, etc., and to prevent the loss of lubricant.

The top of the king pin is journa'ledin a bearing in fork 14 comprisinga bushing or seat 36 engaging a packing 38, and tapered rollers 40 andrings 42 constituting an annular roller thrust bearing, the king beingheld in place by a castellated nut 44. A dust cap 45 is threaded intothe opening in fork 14.

As shown in Fig. '1, the king pin is hollow, and a grease c ip 46'and apassage 48 therefrom are provided for the introduction of lubricant toan annular groove 50 and through a hole or holes drilled through thesides of the king pin into its hollow interior. The lubricant passes outof the top of the pin for the top bearing, and through holes 52 intogrooves 54 for the lower hearing.

The brake comprises'a drum 56 and a band 58 consisting of two shoespivotally mounted at 60 on a plate 62 which covers the open end of thedrum, and which is carried by knuckle 12. Bearing pieces 64 arescrewcdto the ends of the band, and engage o'pposite sides of a cam 66 mountedin a'cy'lindrical support 68 secured to plate 62. In the modificationshown in Fig. 5, the support and plate are formed in one integral'member 70.

According to one feature of the invention, means is provided forlubricatingcam- 66, inc uding a grease cup 72 communicating with apassage 74 in sup ort 68, which in turn communicates with t e ho'llowend of the cam through a slot in the side of the cam. PassagesNara-formed in the cam to distribute the lubricant, and a covering piecesuch as a gasket 78 attached to the cam prevent-s escape of thelubricant.

The cam is integral with a short rockshaft formed with a yoke 80 securedby a hollow vertical pin 82 to a horizontal yoke 8d on a sleeve 86having an arm "88 for operating the cam. Pin 82 carries'a member 90formed with hollow extensions carrying caps 92 on which the yoke 84turns, the caps being held by a. bolt 94. A hole 96 providescommunication between the interior of pin 82 and the interior of member90, and a grease cup 98 is arranged to introduce lubricant into pin- 82,holes beingdrilled to distribute the lubricant. The whole structureprovides a lubricated universal joint in alinementwith king pin 26,. sothat the steering and braking operations do not interfere with oneanother.

Sleeve 86 is slidably arranged on a support universally mounted directlyon the spring-supported frame- 100, the support I pin 102 carryinghalf-sockets 104: embracing a ball 106 having an eatension journaled ina bracket 108 .riveted'to' frame 100. "1A castellated nut 110 holds theball audits extension in place and one half-socket 104 is threaded intothe pin 102 to hold the whole joint together.

In order to lubricate the sliding connection and theball-and-socketjoint, a grease up.112 dommunicates with the hollow interior ofball 106,and holes are drilled through the, sides of the ball in alinement withthe grpove between adjacent faces of the halfsoekets 104. A retainer 114with-a packing 116 prevent loss oflubricant around the extension at theside of the ball. The pin 102 slides in a cup 118 seated in sleeve 86,and held by a bushing 120 engaging a packing 122. The pin is hollow, asshown at 124, to receivelubricant from the above-described groovebetween adjacent faces of the halfsockets 104. A hole drilled throughthe side of the pin permits the lubricant to pass to an annular groove126 in registrywith an internal groove formed in cup 118.

The'band is positioned laterally by springs Q128engaging washers seatedagainst opposite faces of theweb 130 of band 58, the rsprings beingconfined by nuts 132 on a bolt l34 h el d in late 62 by a, nut 136. Aspring 138, whie holds the hand against the cam, is attached to the webat opposite sides.

description of illustrative embodiments of our invention, or otherwisethan by the terms of the appended claims, as obviously varioussubstitutions and modifications may be made without departing from itsspirit.

We claim; I

1. A vehicle comprising in combination, a wheel and axle arranged forrelative steering movement about a generally vertical axis, a brakehaving an operating device arranged for steering movement with thewheel, a spring supported frame, a spherical member supported on saidframe and a telescopic reach member operatively connected to said brakeoperating device and havinga side opening in the end thereof adjacentthejraine, and which opening is adapted to receive said sphericalmember.

2. A vehicle comprising-in combination, a wheel and axle arranged forrelative steering movement about a generally vertical axis, a brakehaving an operating device arranged for steering movement with thewheel, a spring supported frame, a ball supported from said frame, a.pin'havi'ng a socket in tl'e end thereof adjacent the frame, and whichsocket has a side opening fittin over said ball, and a sleeve slidalrleon said pin and connected to said brake operating device tlrongh auniversal joint.

3. A vehicle comprising incombination a wheel and axle arranged forrelative steering niiove' 'nent about a generally vertical axis, a brakedrum ro'tatable with said wheel, brake shoes arranged in said drinnandheld from secured to said cam and preventing with-- drawalof the samefrom bewteen the ends of said brake shoes, and operating meansassociated with said cam.

In testimony whereof we allix our signatures.

GUY E; PARKER. ARTHUR STAHLH UTH.

